Rear bumper for an automobile



FIG. 1 is a front perspective view of a rear bumper for automobile showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a right side elevation view thereof.

The broken lines in the drawings illustrate portions of the rear bumper for automobile that form no part of the claimed design. 

CLAIM The ornamental design for a rear bumper for automobile, as shown and described. 